drivers/staging/octeon/cvmx-scratch.h

   1 /***********************license start***************
   2  * Author: Cavium Networks
   3  *
   4  * Contact: support@caviumnetworks.com
   5  * This file is part of the OCTEON SDK
   6  *
   7  * Copyright (c) 2003-2008 Cavium Networks
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this file; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  22  * or visit http://www.gnu.org/licenses/.
  23  *
  24  * This file may also be available under a different license from Cavium.
  25  * Contact Cavium Networks for more information
  26  ***********************license end**************************************/
  27
  28 /**
  29  *
  30  * This file provides support for the processor local scratch memory.
  31  * Scratch memory is byte addressable - all addresses are byte addresses.
  32  *
  33  */
  34
  35 #ifndef __CVMX_SCRATCH_H__
  36 #define __CVMX_SCRATCH_H__
  37
  38 /*
  39  * Note: This define must be a long, not a long long in order to
  40  * compile without warnings for both 32bit and 64bit.
  41  */
  42 #define CVMX_SCRATCH_BASE       (-32768l)       /* 0xffffffffffff8000 */
  43
  44 /**
  45  * Reads an 8 bit value from the processor local scratchpad memory.
  46  *
  47  * @address: byte address to read from
  48  *
  49  * Returns value read
  50  */
  51 static inline uint8_t cvmx_scratch_read8(uint64_t address)
  52 {
  53         return *CASTPTR(volatile uint8_t, CVMX_SCRATCH_BASE + address);
  54 }
  55
  56 /**
  57  * Reads a 16 bit value from the processor local scratchpad memory.
  58  *
  59  * @address: byte address to read from
  60  *
  61  * Returns value read
  62  */
  63 static inline uint16_t cvmx_scratch_read16(uint64_t address)
  64 {
  65         return *CASTPTR(volatile uint16_t, CVMX_SCRATCH_BASE + address);
  66 }
  67
  68 /**
  69  * Reads a 32 bit value from the processor local scratchpad memory.
  70  *
  71  * @address: byte address to read from
  72  *
  73  * Returns value read
  74  */
  75 static inline uint32_t cvmx_scratch_read32(uint64_t address)
  76 {
  77         return *CASTPTR(volatile uint32_t, CVMX_SCRATCH_BASE + address);
  78 }
  79
  80 /**
  81  * Reads a 64 bit value from the processor local scratchpad memory.
  82  *
  83  * @address: byte address to read from
  84  *
  85  * Returns value read
  86  */
  87 static inline uint64_t cvmx_scratch_read64(uint64_t address)
  88 {
  89         return *CASTPTR(volatile uint64_t, CVMX_SCRATCH_BASE + address);
  90 }
  91
  92 /**
  93  * Writes an 8 bit value to the processor local scratchpad memory.
  94  *
  95  * @address: byte address to write to
  96  * @value:   value to write
  97  */
  98 static inline void cvmx_scratch_write8(uint64_t address, uint64_t value)
  99 {
 100         *CASTPTR(volatile uint8_t, CVMX_SCRATCH_BASE + address) =
 101             (uint8_t) value;
 102 }
 103
 104 /**
 105  * Writes a 32 bit value to the processor local scratchpad memory.
 106  *
 107  * @address: byte address to write to
 108  * @value:   value to write
 109  */
 110 static inline void cvmx_scratch_write16(uint64_t address, uint64_t value)
 111 {
 112         *CASTPTR(volatile uint16_t, CVMX_SCRATCH_BASE + address) =
 113             (uint16_t) value;
 114 }
 115
 116 /**
 117  * Writes a 16 bit value to the processor local scratchpad memory.
 118  *
 119  * @address: byte address to write to
 120  * @value:   value to write
 121  */
 122 static inline void cvmx_scratch_write32(uint64_t address, uint64_t value)
 123 {
 124         *CASTPTR(volatile uint32_t, CVMX_SCRATCH_BASE + address) =
 125             (uint32_t) value;
 126 }
 127
 128 /**
 129  * Writes a 64 bit value to the processor local scratchpad memory.
 130  *
 131  * @address: byte address to write to
 132  * @value:   value to write
 133  */
 134 static inline void cvmx_scratch_write64(uint64_t address, uint64_t value)
 135 {
 136         *CASTPTR(volatile uint64_t, CVMX_SCRATCH_BASE + address) = value;
 137 }
 138
 139 #endif /* __CVMX_SCRATCH_H__ */